To study the sediment residue budgeting for indian coast with special reference to Kottyam coast

Abstract

newline2 newline newlineBottom sediments from thirteen transects chiefly inspected at newline newlineprofundity shapes of 30, 100 and 200m along the western mainland newline newlineedge of India, falling in two seaward areas from Dwaraka to Goa and newline newlineCape Comorin to Goa were investigated for calcium carbonate, major newline newlinecomponents in silicate division, follow and extraordinary earth newline newlinecomponents in the mass division, and carbon and nitrogen isotopes in newline newlinenatural matter to grasp the provenance of sediments, weathering newline newlineexamples in the source ranges and nature of natural matter. Major newline newlinecomponents, for example Si, Ti, Mg and segregation plots including newline newlinealkalies and silica have demonstrated an unique north-south newline newlinecommonplace nature with the source marks indicating at Deccan newline newlinebasalt for sediments in north (from Dwaraka to Goa) and gneisses and newline newlinegranulites of South India in south. Shale standardized REE designs newline newlineand REE content infer extra neighborhood sources mostly in the newline newlinesouthwest coast of India. Degree of adjustment dead set utilizing newline newlineChemical Index of Alteration (CIA), Plagioclase Index of Alteration newline newline(PIA), A-CN-K plots have inferred that the sediments are reasonably newlineweathered notwithstanding the compelling orographic precipitation in newline newlinethe source range. Variability in level of compound weathering is seen newline newlinewith the change in provenance. By and large, the sediments north of newline newlineGoa with a provenance of Deccan basalts show higher synthetic newline newlineweathering file. Corg/n molar degrees (range = 6.9 and 14) are for the newline newlinemost part between 10 and 12 which are closer to marine natural newline newlinematter qualities. This is validated by marine and#948;13c values (-18.2 to newline21.6 ). While, they extensively succumb to the marine values, newline newlineheavier qualities are seen in northern transects off Porbandar and newline newlineDwaraka where the sediments have a provenance not the same as newline newlinethose in the south. This could be because of a higher commitment newline newlinefrom C-4 sort vegetation in the north, steady with heavier and#948;13c values newline newlinein physical plants in source districts. Similarly heavier and#948;15n q